Apparatus for cleaning waste pipes



1933- B. c. CARMINE 6 APIARATUS FOR CLEANING WASTE PIPES Filed Oct. 14,1932 WITNFSSES: B yaw? By en amm -armme, 9' W5 UNITED STATES.

Patented Dec. 5, 1933 v APPARATUS FOR CLEANING WASTE PIPES unname-Benjamin'C. Carmine, Cambridge, Md.

Application This invention relates to apparatus for cleanthe supply pipeis available to remove an obstruction in the waste pipe.

I-Ieretofore it has been connecting pipe between thewater supply pipeand waste pipe of a basin, and to employ cut-01f valves inthe'connecting pipe and waste pipe,

' which when operated in the proper manner cause water under pressure tobe admitted to the waste pipe and directed downward therethrough toremove sediment. or other foreignmatter with which the waste; pipehasbecome'clogged. Such apparatus isshown in U. S. Letters Patent to Ore E.Townsend, No. 1,164,892, granted December 21, 1915. In utilizing thearrangement there shown, certain difficulties are experienced: due tothe varying locations of the water. supplypipes and wastepipe indifferent types of basins. Moreover, according to thatscheme, twovalves, which mustbe operatedin proper sequence, are employed,- and thisrenders the operation sufiiciently complicated so that itis beyond thecomprehension of the average household servant.

. The principalobjectof my invention is to over- .come theaforementioned difficulties by the pro- 35- vision of anautomaticcheck'valve in'the waste pipe of such apparatus, this valvebeing operable under the influence of a pressure jet to seal offcommunication between the waste pipe and basin, and being removable fromits casing for the purpose of cleaning or replacement. 7

Other more specific objects of my invention relate to the provision of aspecial form of check valve and its manner of operation; and to theemployment of pipe fittings which can be readily applied to all commonforms of water basins, irrespective of the locations of the pipesleading thereto, whereby they may be converted to the practice of myinvention.

Still other objects and advantages characterizing my invention willbecome more fully apparent from the description hereinafter set forth ofone embodiment or example thereof, having reference to the accompanyingdrawing. Of the drawing:

Fig. I represents a front elevation of a water basin to which myinvention has been applied,

proposed to provide a October-'14, 1932. Serial No. 637.691

' 2 Claims. ('01. 182-452) Fig. II represents an enlarged detailed frontview of the waste-pipe leading downward from the basin, certain partsbeing shown in cross sec,- tion for clearness of illustration; and,

Fig. III represents a side view of the waste pipe, with certain partsshown in cross section.

With reference initially'to Fig. I of the drawing, there is shown abasin 1, such as an ordinary sink, having the usual hot and, cold watersupply pipes leading thereto, these pipes being designated respectivelyat 2 and 3. The'water supplylpipes 2 and ,3 terminate in faucets 4 abovethe basin. The waste pipe leading downward vfrom the basin 1 iscomprehensivelydesignated at 5. It includes a shortpipe section '6extending downward from the outlet '7 at the bottom Of the basinl and alowerpipe section. 8. Between the upper and lower sections 6 and.8 ofthe waste pipe,---there is a special three-way fitting 9,. andimmediately below this a U-shaped trap 10, these parts being shown indetail in Figs. II and III.

The special fitting 9 is connected at its upper end to the uppersection'6 of the waste pipe by a slip joint 11, which enablesone part tobe swiveled" with respect to the other., Similarlyat its lower end thefitting 9 hasa like slip joint 12 by which it is connected to one leg ofthe trap 10 and adapted to swivel with respect thereto. 'The trap 10 isin turnconnected to the lower section 8 of the waste pipebbyanother likeslip joint 13, 8 as shown in Fig. III. In the hot water'sup'ply pipe 2there is'provided a tee 14to which is attached a'connecting pipe 15which leads to the special fitting 9 ofthe waste "pipe 5. The.connecting pipe 15 includes therein a manually operated cut-offvalve 16and a terminal member. 17 by which it is joined to the waste pipefitting 9. The terminal member .17 has one end 18 threaded forengagement with the cut-off valve 16. It includes as an integral part anut 19. Also formed integrally with the terminal member l'l there is acap portion 20 which is internally threaded and adapted to engageexternal threads on thevalve casing 21 of the waste pipe fitting 9.Disposed centrally of the cap portion 20 there is 1 00 a nozzle 22 ofreduced diameter. 7

In the valve casing 21 of the waste pipe fitting 9 there is providedaswinging check valve 23. The swinging check valve 23 is supported on aIn an obvious manner the hinge pin 24 may 1 10.

be unscrewed to permit the removal of the valve 23 through the largeopening at the entrance to the valve casing 21. The swinging check valve23 includes a disk 26 and a flat plate 27 attached to the rear facethereof.

In its normal position the swinging check valve 23 engages a ledge 28within the valve casing 21 and rests in a vertical position notobstructing the passage of water from the basin 1 through the waste pipe5. this position the check valve 23 is immediately in advance of thenozzle 22 of the connecting pipe 15. The plate 27 afiords a flat surfaceagainst which the jet of water from the supply pipe 2 will impinge whenthe cut-01f valve 16 is opened. Under the infiuence of the pressure jetfrom the connecting pipe 15, the check valve .23 is adapted to swing toa position shown in broken lines in'Fig. II. In the latter position itengages an annular seat 29 within the fitting 9. A simple method offorming a valve seat such as indicated at 29 is to insert a tube havinga diagonally cut end within the fitting 9 and to join the two partstogether by sweating. r 1

The operation of the above described apparatus is as follows. Underordinary circumstances the manually operated valve 16 is closed and theswinging check valve 23 is disposed vertically against the ledge 28 ofthe casing 21. Assuming that the waste pipe has become choked withforeign material, and that it is desired to clean it out, the cut-offvalve 16 is opened. Water is then admitted from the hot water supplypipe 2 through the connecting pipe 15 to the nozzle 22. As the jet ofWater issues from the nozzle 22, 'it strikes the flat plate 27 of theswinging check valve 23 and causes the latter to swing upwardly toengagement with the annular valve seat 29.

I This permits the passage of hotwater to the lower section 8 of thewaste pipe and obstructs passage of such water to the upper section 6 ofthe waste pipe. Moreover, if the obstruction in the Waste pipe is notdislodged at once by the incoming water pressure will build up in thewaste pipe fitting '9, and the check valve 23 being maintained underpressure against the annular seat 29, the full force of the waterpressure-will be available to force out the obstruction in the wastepipe.

It is to be particularly noted that the check valve 23 is so designedand related to the connecting pipe 15 that immediately upon the openingof the cut-off valve 16, it is swung to engagement with the annular seat29, so that with the first rush of water into the waste pipe there willbe no escape of a part of the water upward through the upper section 6of the waste pipe into the basin 1. Furthermore, it is important to notethat the special fitting 9 of my invention is so designed that it may bereadily applied to all ordinary forms of basins, and that it is a verysimple matter to adjust this fitting to the proper angle for connectionto the hot or cold water supply pipe leading to the basin. The few partswhich are added to the equipment available to accomplish the conversionof a water basin to the practice of my invention are of simple andeconomical manufacture. I

While I have shown and described one particular example or embodiment ofmy invention, it will be understood that various changes may be made asto the form of the special fitting. employed and the parts associatedtherewith with- 90 out departing from the spirit of my invention asdefined in the annexed claims.

'Having thus described my invention, I claim:

1.. In combination with a basin having a water supply pipe, and a wastepipe with a three-way fitting therein, a pipe connection leading fromsaid water supply pipe to said three-way fitting and there terminatingin a nozzle, a manually opera-ted valve in said pipe connection, and aswingw ing check valve disposed at the side of said fitting ill inadvance of said nozzle, said check valve being adapted, when saidmanually operated valve is opened, to be swung upward under the pressureof water issuing from said nozzle to a position per mitting passage ofsuch water to the section 0] the waste pipe beneath said fitting andobstrucing passage of such water to the section of the waste pipe abovesaid fitting,and said fitting having an enlarged opening surroundingsaid nozzle through which opening said swinging check valve isremovable.

.2. In combination with a basin having a water pp y pipe, and a wastepipe with a'three-way fitting therein, a pipe connection leading from'said water supply pipe to said three-way fitting and there terminatingin a nozzle, a manually operated valve in said pipe connection, a hingepin disposed within said fitting and removable through the wall thereof,and a swinging check valve pivoted on said hinge pin in advance of 13 5;said nozzle, said check valve being adapted, when said manually operatedvalve is opened, to be swung upward under the pressure of water issuingfrom said nozzle to aposition permitting passage of such water to thesection of the waste i pipe beneath said fitting and obstructing passageof such water to the section of the waste pipe above said fitting, andsaid fitting having an enlarged opening surrounding said nozzle throughwhich opening said swinging check valve is re- 3 movable.

BENJAMIN C. CARMINE.

